Malicious PDF — malware analysis report

Static analysis result for SHA-256 078c31e6ea6d508e…

MALICIOUS

PDF

44.2 KB Created: 2021-06-04 00:15:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: dc75c24cd0464e8c019029a2ca07f7c8 SHA-1: d6e4a95ef21e6b7457cbc7ab10a113ff437e00e0 SHA-256: 078c31e6ea6d508e2f2faabc8f5791e168d48c932a2db9cc2f76eae729add435
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on a "game hack" generator. The primary malicious link redirects to infrastructure known for distributing malware. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving users to malicious websites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-daily-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ed9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED9 26388 bytes
SHA-256: 92ff1b75c2e4f9b30cac6dd32fe329fa952740e5300818239d2fc4bf88f5238d
font_01_sfnt_off00008af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF9 17968 bytes
SHA-256: 1c98f969960cfec6eaf841278575df19fc01610fe59bbf31221366f86d0cd1bd

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